How to use the age of a particle to change a modifier of a particle itself?
A simple way I just found is to use animation node (here version 2.1.8) and to loop on the particles object. Here is the graph I made:

Note: this is only a minimal setup to have something working (the result is not really useful/pleasant for a real animation), also for some reason I am unable to set a modifier into the &quot;Object Data Path Output &gt; Path&quot; field. Only object specific data are working.
My scene only contains a cone for the particle and a cube for the emitter.